KLK3 and neoplasm: PPFV weakly correlated with initial PSA levels (rs = 0.26, p = 0.04, Spearman’s Rank correlation), but not with time to nPSA (rs = 0.04, p = 0.78), Gleason score (rs = −0.03, p = 0.82) or tumour stage (rs = −0.08, p = 0.52).